NO可能作为H2O2的下游信号介导ABA诱导的蚕豆气孔关闭

被引:40
作者
吕东
张骁
江静
安国勇
张玲瑞
宋纯鹏
机构
[1] 河南大学生命科学学院,河南大学生命科学学院,河南大学生命科学学院,河南大学生命科学学院,河南大学生命科学学院,河南大学生命科学学院开封,开封,开封,开封,开封,开封
关键词
脱落酸; 过氧化氢; 一氧化氮; 信号转导; 保卫细胞;
D O I
暂无
中图分类号
Q945 [植物生理学];
学科分类号
0903 ;
摘要
ABA、H2O2和硝普钠(SNP)均能诱导蚕豆气孔 关闭。NO的清除剂c-PTIO可以减轻由ABA或H2O2所 诱导的蚕豆气孔关闭的程度,而过氧化氢酶(CAT)则不 能减轻NO诱导的气孔关闭程度。激光共聚焦显微检测 结果显示,10 μmol/L的ABA处理后,胞内H2O2的产 生速率明显高于NO的产生速率;CAT几乎可完全抑 制ABA所诱导的DAF的荧光增加;外源H2O2能显著 诱导胞内DAF的荧光增加;c-PTIO对ABA诱导的DCF 荧光略有促进作用,但外源SNP不能诱导胞内DCF荧 光增加。这些结果表明,在ABA诱导气孔关闭过程中, H2O2可能在NO的上游起作用并受NO的负反馈调节。
引用
收藏
页码:62 / 70
页数:9
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